Steam-superheater.



No. 774,335. PATENTED NOV. 8, 1904. N. NOTKIN.

STEAM SUPERHEATBR.

APPLICATION FILED P2125. 1904.

N0 MODEL.

Inventor Wt Mu fif/f/n.

At torney Patented November 8, 1904.

PATENT OFFICE.

NAUM NOTKIN, OF MQSCOVV, RUSSIA.

STEAM-SUPERHEATER.

:a'EECIFIGATION forming part of Letters Patent No. 774,335, datedNovember 8, 1904.

Application filed February 25, 1904. Serial No. 195,279. (No modeLl To awhom it warty concern:

Be it known that I, NAUM N OTKIN, a subject of the Emperor of Russia,residing at Moscow, Russia, have invented certain new and usefulImprovements in Steam Superheaters for Steam-Boilers; and I do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention is an improved steam-superheater adapted for use in thesmoke-tubes of locomotive or other steam boilers; and it consists in theconstruction, combination, and arrangement of devices hereinafterdescribed and claimed.

In the accompanying drawings, Figure l is a vertical longitudinalsectional view of a locomotive-boiler provided with my improvedsteam-superheating device. Fig. 2 is a horizontal sectional view of mysteam-superheating device, showing the same on a larger scale anddetached from the boiler; and Fig. 3 is a transverse sectional viewtaken on the plane indicated by the line a a of Fig. 2.

In the embodiment of my invention I provide a junction-box l, which ispreferably of the form here shown, but it may be of any suitable form,is adapted to be placed in the smoke-box of a locomotive or other typeof boiler, and is provided with an inlet-chamber 2 and an outlet-chamber3, divided from each other by a wall or partition 4 and provided,respectively, with an inlet-opening 5 and a discharge-opening-6. Asuitable steam-conduit, which is not here shown, as the same will bewell understood by those skilledin this art, leads from the steam-spaceof the boiler to the inlet-chamber 2 to supply the latter with saturatedsteam from the boiler. A pipe 7 is connected to the discharge-opening 6and serves as a conduit for the superheated steam.

Tubes 8 of suitable length and diameter are attached to the outer wallof the chamber 3 and extend from said chamber into the firetubes (4 ofthe boiler, as shown. The said tubes 8 may be of any suitable length andmay extend through the said fire-tubes to any desired extent. Thediameter of the said tubesfl8 is somewhat lessthan the interior diameterof the fire-box, so that the same do not obstruct the passage of heatedgases and other products of combustion from the furnace through thefire-tubes. Each of the said tubes 8 is provided at the end nearest thefurnace with a cap 18, secured thereto and forming a closure therefor,the said caps being preferably of the form here shown.

Within the tubes 8 are smaller tubes 10, which are open at both ends andhave their front or outer ends secured in openings in the partition-wallL of the junction-box and in communication with the chamber 2 thereof.To increase the heating-surfaces of the tubes 8, the latter are providedon their innor sides with longitudinal ribs 11, which are spacechapartand radially disposed. These ribs could, if preferred, be formedexteriorly onrthe inner tubes 10.

Owing to the reduced scale on which Fig. l is made the pipes 10 are eachindicated therein by a single line. Said pipes are clearly shown in Fig.'2, which is on a larger scale.

As shown in the drawings, the operation of my invention is as follows:The saturated steam passes from the chamber 2 of the junction-boxthrough the inner tubes 10 and is discharged therefrom into the outertubes 8 at a point near the tire-box. The outer tubes are intenselyheated by the heated gases and other products of combustion which passthrough the fire-tubes of the boiler, so that the steam which isdischarged into the tubes 8 from the inner tubes 10 becomessuperheatedin said tubes 8, passes therefrom into the chamber 3 of thejunction-box, and is discharged from the said chamber through theopening 6 and the pipe 7 attached thereto. It will be readily understoodthat this arrangement could be reversed without the exercise ofinvention to cause the saturated steam to be conveyed to the chamber 3,to pass through the tubes 8, become superheated therein, and to bedischarged from the said tubes 8 through the tubes 10 and into thechamber 2. I therefore do not desire to limit myself in this particular,but reserve the right to use my improved device either way. From theforegoing description, taken in fire-tube of a boiler and having one endclosed and the other end open, and an inner tube in thesuperheating-tube and having both ends open, one of said tubes beingprovided With longitudinally-disposed ribs forming enlargedsuperheating-surfaces therefor.

In testimony whereof I have hereunto set my hand in presence of tWosubscribing Witnesses.

N AUM N OTKIN.

Witnesses:

An'runus STRATToN, GUSTAV H ARTMAN.

